mc3phacvp Freescale Semiconductor, Inc, mc3phacvp Datasheet - Page 21

• Manufacturer Part Number: mc3phacvp
• Description: Mc3phac Motor Control Unit
• Manufacturer: Freescale Semiconductor, Inc

PC Master Software Operation with the MC3PHAC
When power is first applied to the MC3PHAC, or if a logic low level is applied to the RESET pin, the
MC3PHAC enters PC master software mode if the VBOOST_MODE pin is low during the initialization
phase. The MC3PHAC recognizes a subset of the PC master software command set, which is listed in
Table
With the READVARx commands, the addresses are checked for validity, and the command is executed
only if the address is within proper limits. In general, a read command with an address value below $0060
or above $EE03 will not execute properly, but instead will return an invalid operation response. An
Freescale Semiconductor
GETINFOBRIEF
READVAR8
READVAR16
READVAR32
WRITEVAR8
WRITEVAR16
Command
Notes:
1. If no external fault circuit is provided, connect to V
2. Use bypass capacitors placed close to the MC3PHAC.
3. Consult crystal/resonator manufacturer for component values.
5.
22 pF
22 pF
RESET
NOTE 3
10 MΩ
+5 V
+5 V
Figure 13. MC3PHAC Configuration for Using a PC as a Master
10 kΩ
0.1 µF
MC3PHAC responds with brief summary of hardware setup and link configuration
MC3PHAC reads an 8-bit variable at a specified address and responds with its value
MC3PHAC reads a 16-bit variable at a specified address and responds with its value
MC3PHAC reads a 32-bit variable at a specified address and responds with its value
MC3PHAC writes an 8-bit variable at a specified address
MC3PHAC writes a 16-bit variable at a specified address
10 kΩ
information
Table 5. Recognized PC Host Software Commands
MC3PHAC Monolithic Intelligent Motor Controller, Rev. 2
0.1 µF
NOTE 2
+5 A
A
10
11
12
13
14
1
2
3
4
5
6
7
8
9
V
RESET
V
V
OSC2
OSC1
PLLCAP
PWMPOL_BASEFREQ
PWM_U_TOP
PWM_U_BOT
PWM_V_TOP
PWM_V_BOT
PWM_W_TOP
PWM_W_BOT
REF
DDA
SSA
MC3PHAC
VBOOST_MODE
PWMFREQ/RxD
DT_FAULTOUT
RETRY/TxD
SS
RBRAKE
DC_BUS
FAULTIN
MUX_IN
SPEED
ACCEL
START
.
FWD
V
V
DD
SS
Description
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DATA TO PC
+ 5
NOTE 2
NOTE 1
DATA FROM PC
10 kΩ
OR NON-ISOLATED
RS232 INTERFACE
560 Ω
FAULT LED
FROM DIVIDED DC BUS
TO RESISTIVE BRAKE DRIVER
FROM SYSTEM FAULT
DETECTION CIRCUIT
ISOLATED
+5 V
CONNECTION
TO HOST
Operation
21